If the north poles of two bar magnetsup7/b69ngvqz are brought close to each other, the magnet7qgpb/6vzn9u s will

  If the south pole of one bar magnet is brought near the nort;zp :q6o vax9yh pole of a second bar magnet, the twoq9x: v z;ayp6o magnets will

  If a bar magnet is divided into two equal pieces,f( h 8e,gllqc-

  The Earth's geographic North Pole is ma/:bi:f etid6 bgnetically a

  The south pole of a m u,9ehhnw-ui ccy0np:ar 1r1tr*y3 uq39d gh3 agnet points toward the Earth's

  An electric current proap 1jffuoh15 5 g69mxmduces

  Which of the followi) 19zuw mg2w8mhn c)ekng is correct?

  A vertical wire carri xh /vmpj-r8a9-(x p /uaj itdgp9:f3ses a current straight down. To the east of this wire, the marha9p3x(m/p - djxajg-vps u:98/ iftgnetic field points

  A horizontal wire carries a current straight towajq51on 5 yb.iprd you. From your point of view, the magnetic field caused i yp5boqj .n51by this current

  A current carrying loop of wire lies flat wfk 4ouro7+ y)on a table top. When viewed from above, the current moves around the loop in a counterclockwise sense. What is the direction of the+yk o o7ruw)f4 magnetic field caused by this current, outside the loop? The magnetic field

  A current carrying circular loop of wire lies flat on a table top. When vil00w-*n ct ar8gvrb q-ewed from above, the current moves around the loop in a counterclockwise sense. What is the direction ofrq-0lc 0v* gwa-8r tnb the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic f clk 5iwdnv6m2o j9m78ield is the

  1 T is equivalent tog4wapk9 4oyq 0dn) l0j

  The direction of the force on a current-carrying wire in a magnetic field is d7p3o 3t q4;e vuopea+tescribed b 3v4uaet poqp;+o3te 7y which of the following?

  The force on a current-ca(+wg *d2 q/jdcla dy6mrrying wire in a magnetic field is the strongest when

  The force on a current-carrying wire in a magnetic field is equal to zero when62lk f,aw oj;q56 jwsj

  A vertical wire carrie(4 rqdm0gd(r.o xf+jz6qd:5 s rmhfn* s a current straight up in a region where the magnetic field vector points due north. What is the direc (jo+qfr4hrnqd *gdd:xsm0.m6fzr(5tion of the resulting force on this current?

  A charged particle mov9x0rmt4)ixg mc/40fjrl 5gau5fgg d8es and experiences no magnetic force. From this we can conclude th)0m grm5g4u t8fx/4gc5 ixd r0gj9fa lat

  A charged particle moves with a constant speed through a region where *w)yki l)0dbza uniform magnetic fi)d0 *ybkiz)wleld is present. If the magnetic field points straight upward, the magnetic force acting on this particle will be maximum when the particle moves

  A charged particle moves across a constant magnetic field. e yoi, g20 q,s+ajt1jyThe magnetic force on this particle,o+jsy, a e1tigj2 yq0

  A charged particle i,a8 nn/oy8;* abjqth3c ldr3ss injected into a uniform magnetic field such that its velocity vector is perpendicular to the magnetic field vector. Ignoring the particle's weight, the particlb3qat;j*nr/yso3 ,d lh8a8 cne will

  A charged particle is5j7 :b iaop6/z;jj0 lhny./v)j qulavk/ p t*h observed traveling in a circular path in a uniform magnetic field. If the particleq/* hz ju0j6;b/5lya lph nv:tvp. j7 j/k)ioa had been traveling twice as fast, the radius of the circular path would be

  A particle carrying a charge of +e travels invq+otj : wcs,x6,yhi2 a circular path in a uniform magnetic field. If instead the particle carried a charge of +2e, the radius of the circular pat ,ysj+:ti2xoqh vwc6, h would have been

  At a particular instant, an electron moves eastward at gzt+4 w8 go(gpspeed V in a uniform magnetic field that is directed straight downward. The magnetic forceg(wg go 4z8+tp that acts on it is

  An electron has an initial velocity to the south but is observed a56: eorzw 2zwto curve upward as the result of a magnetic field. z 5oae:w6 2zrw The direction of the magnetic field is

  An electron moving along the +x axis enters a region wher b4ggui/5o )wle there is a uniform maibg4o u5/lg )wgnetic field in the +y direction. What is the direction of the magnetic force on the electron? (+x to right, +y up, and +z out of the page.)

  The magnetic field produced by - wcum fq3nwj,7-mlse f/4bu ;a long straight current-carrying wire is

  At double the distance from a long curremb(1wc*e k 2sai2q3ug z) rh,int-carrying wire, the strength of the magnetic field produced by tg ,)ceu*khw1s 23ibzq2rma(ihat wire decreases to

  Two long parallel wires placed side-by-side on a2m2a.d) t di;hdl izh- horizontal table carry identical size currents in opposite directions. The wire on your right carries current toward you, and the wire on your left carries current away from you. From your point of view, the magn.a2dli;tm) -zd ihh2detic field at the point exactly midway between the two wires

  Two long parallel wires placed side-by3y0us f ,oz.vvlll1c9/ e9 zwr-side on a horizontal table carry identicay.v 1rsu /ezfz 0lc3o9wl9vl,l current straight toward you. From your point of view, the magnetic field at the point exactly between the two wires

  Two long parallel wires carry equal currents. The magnitude mncdi1:+ ubf+7c yoe7 of the force between the wires is F. The current in each wire is now doubled. What is the magnitude of the new force between thecoi7 n 1eu7+y +f:bcmd two wires?

  A long straight wire carries current toward the east. A proa*j 74 /2b)o:*q gsrm) y trqkbeid)vnton moves toward the east alongside and just south of the wire. What is the direction of the force on the proo)qkvei ab*b y:s r))t*q 47mgn/dr2 jton?

  A wire lying in the plane of the page carries a current toward the bottomed/ g w)f3- kz)f(jscd of the page. What is the direction of the magnetic force it produces on an electron that is moving perpendicularly ge3j) f/- kfc)(sdzwdtoward the wire, also in the plane of the page, from your right?

  Two long parallel wires are placed sidmj:zr 2 xkvfst*q ,(w:rh)8dd e-by-side on a horizontal table. If the wires carry currensq*2h8:zd)r,r: fmj(w xtvk dt in the same direction,

  Two long parallel wires are placed side-by-side on a horizontal table. If theq1i+ai 9g 8+yrqbsh1hk: q3ea wires carry current in oeki aqs81bqh yq :+i3gh1+ra9pposite directions,

  Consider two current-carrying circular loops. Both arq j8ixf ygmu0eap*k,v6;l 8v,e made from one strand of wire and both carry the same current, but one has twice the radius of the other. Compared to the magnetic field a,,*uv 06l jymv;px gqef8ia8kt the center of the smaller loop, the magnetic field at the center of the larger loop is

  Consider two current-carrying circular loops. Both are made from one strand/n vpnbr+54-nws4x0j kxwhu/ljt7yrc+ z.t- of wire and both carry the same current, but one has twice the radius of the other. Compared to the magnetic moment of the smaller loop, the magnetic momx+rt5wznpu4/lty wv c-.s /+brjnjn47h0- xkent of the larger loop is

  The maximum torque on a currentqcta*)dd )t9 ey.,jni carrying loop occurs when the angle between the loje ,ic* t)9yna q.tdd)op's magnetic moment and the magnetic field vector is

  When placed askew in a magnetic field, a current carr:maj+b-fo m t(ying loop that is free to rotb mo:f+a(-j mtate in any direction will experience a torque until its magnetic moment vector

  What fundamental fact underlies the operq pgb76+hwn .tation of essentially all electric motors7qn t b+.6hpwg?

  A circular wire loop lies in a horizontal plane on a y 0m*m4 +epobi -u:mreq-i9dz table and carries current in a counterclockwise direction when viewed from above. At this point, the Earth's magnetic field pointse49ymqb izm:r e* p--mu+id0o to the north and dips below the horizontal. Which side of the coil tends to lift off of the table because of the torque caused by the currents interaction with the magnetic field?

  In a mass spectrometer a particle of mass m and charge q is accelerated throug3p 2q/mcj an qv z1n5y7luhlgh0bzopl74 z;4+h a potential difference V and allowed to enter a magnetic field B, where iz175az4;47m 0+lg2 lhno v3cl npz/ubyq hqjpt is deflected in a semi-circular path of radius R. The magnetic field is uniform and oriented perpendicular to the velocity of the particle. Derive an expression for the mass of the particle in terms of B, q, V, and R.

  A velocity selector consists of a charged particle passing through crossed efc.zlk7 u8fp6gju). electric and magnetic fields. The forces exerted by th6. z)lekgj7 ucf.pf 8uese fields are in opposite directions, and only particles of a certain velocity will move in a straight line. In the following, disregard the magnitudes of the fields. In a velocity selector, the particles move toward the east, and the magnetic field is directed to the north. What direction should the electric field point?

  A 2.0-m wire carrying a current of 0.60 A is orie k6vp iow 9+hiyvq6; 7m9emh6fnted parallel to a uniform magnetic fieiwkf9h6m9; i 6+omhp 7vq v6yeld of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A iu1vn9b 4+i 2vq sptu2fn a direction of $30^{\circ}$ with respect to the direction of a 0.30-T magnetic field. Find the magnitude of the magnetic force on a 0.50-m length of the wire.

  What is the force per meter on a straight wire carrying p sfxna 7dxe+s)q*:/mcb49 dw5.0 A when it is placed in a magnetic)9xpasw:* mbxd+cq d s/74nef field of 0.020 T? The wire makes an angle of $27^{\circ}$ with respect to the magnetic field lines.

  A thin copper rod 1.0 m long has a mass of 0eij 47)f; duejr.v w8u.050 kg and is in a magnetic field of 0.10 T. What minimum current in the rod iei8j 7u). jrd;fu4ewv s needed in order for the magnetic force to cancel the weight of the rod?

  A stationary proton is in a(wgs,za5yoyj f-.y : v uniform magnetic field of 0.20 T. What is the magnitude of the magyavy s z-:wfy.5,ogj(netic force on the proton?

  A proton moving at $4.0 \times 10^4 \; m/s$ horizontally enters a region where a magnetic field of 0.13 T is present, directed vertically downward. What force acts on the proton?

  An electron moves witv ,d rel) (yfbgb9b ye 3agjpc37m2;2nh a speed of $5.0 \times 10^4 \; m/s$ perpendicular to a uniform magnetic field of 0.20 T. What is the magnitude of the magnetic force on the electron?

  A proton travels at a wawfzts qu,4 j7(nb54n +rew8 speed of $5.0 \times 10^7 \; m/s$ through a 1.0-T magnetic field. What is the magnitude of the magnetic force which acts on the proton if the angle between the proton's velocity and the magnetic field vector is $30^{\circ}$?

  An electron traveling due north with 4rm qer rn49c( 4gcyc(n1w6spelqq0exoy .-3speed $4.0 \times 10^5 \; m/s$ enters a region where the Earth's magnetic field has the magnitude $5.0 \times 10^{-5} \; T$ and is directed downward at $45^{\circ}$ below horizontal. What force acts on the electron?

  An electron moves with a spee qr*-: u*bwd6mm0h uuld of $8.0 \times 10^6 \; m/s$ along the +x axis. It enters a region where there is a magnetic field of 2.5 T, directed at an angle of $60^{\circ}$ to the +x axis and lying in the $xy$ plane. Calculate the magnetic force of the electron.

  An electron moves with a sp kt vkd.or33 +0bbk9m-k x-cyoeed of $8.0 \times 10^6 \; m/s$ along the +x axis. It enters a region where there is a magnetic field of 2.5 T, directed at an angle of $60^{\circ}$ to the +x axis and lying in the $xy$ plane. Calculate the acceleration of the electron.

  A proton has a speed5v*mjcs*kl c z+(aq5d of $3.0 \times 10^6 \; m/s$ in a direction perpendicular to a uniform magnetic field, and the proton moves in a circle of radius 0.20 m. What is the magnitude of the magnetic field?

  A very long straight wire ca8q8/h kh65zrx s9o9hno ti7hjrries a current of 25 A. What is the magnitude of the mag7ozkjhnti s 99hh8oq85/6 xh rnetic field at a distance of 0.15 m from the wire?

  A high power line carrying 1000 A generates what magnetic field at :xmu/ ayx,.6t o ,ksg4 2xhsrdthe ground, 10 m away? .,h4xa x:ukxm s r,od26ygs/t

  How much current must floc/ 3, tbuz5rapw for $1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a long straight wire carrying a vbw w b.bb2rm+8- zz.tcurrent of 5.0 A is the magnitude of the magnetic field due to the wire equal to the strength of the Earth's magnetic field of abb.8b-m. vbt2rzwzwb + out $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry currents of 10 A ind5 0q)5.djy ukvniu 5k)kt/au opposite directions. They are separated by 40 cm. What is the magnetic field in the plane of the wires att )uiq 0u/ydkn5k v5)j.dua 5k a point that is 20 cm from one wire and 60 cm from the other?

  Two long parallel wires carry currents of 20 A and 5.0 A in opp;uph0 j8y/v (h;pngj s p6ax)bosite directions. The wires are separated by 0.20 m. What is the magnetic field midway betwe(jyv0/6pbpj;xp 8hshugn a; )en the two wires?

  Two long parallel wires carry currents of 2r hx .- fwafyee1:2mr10 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. At what point between the two wires are the contributions fr-frh.w rx e1am:ef21yom the two wires the same?

  Four long parallel wires each carry 2.0 A in the same directi0wya s-;xy )a+:z.z5c uog syeon. They are parallel to the z-axis, and they pass through the corners of a square os:) 0z-yg. 5yxwzacsa;y +euof side 4.0 cm positioned in the x-y plane. What magnetic field does one of the wires experience due to the other wires?

  Two long parallel wires carry curg. (fqunq;7(m tw:e sfrents of 5.0 A and 8.0 A in the opposite direction. The wires are separated by 0.3 n(g ;qtsquew.7(mf:f 0 m. Find the magnetic force per unit length between the two wires.

  What is the magnetic field at the center of a circular loop of w 0)m bczax/jbh25z,mk ire of radius 4.0 cm when a current of 2.0 A flows in the wbkmcahzx)5 m ,zb2j/0ire?

  A solenoid 20 cm long is wound with 5000 turns of wire. What magnetic fiela koy j)1t7t*ad is produced at ka*tao)j 71tythe center of the solenoid when a current of 10 A flows?

  A solenoid with 500 turbw tahx3 f3c tg)pp2 y-is((n,ns is 0.10 m long and carries a current of 4.0 A. What strength of magnfpta g hy-3wi snxb)2,(cp(3tetic field will it have at its center?

  How much current must pass through mj( 0j ed0nb40yqxns16)llxx a 400 turn coil 4.0 cm long to generate a 1.0-T magnetic field at tx m0xsd1 xl j4 be)nj6nyq(0l0he center?

  How many turns should a 10-cm long solem ,hzl.g3bl42gv rml6noid have if it is to generate a $1.5 \times 10^{-3} \; T$ magnetic field on 1.0 A of current?

  What is the magnetic moment of a rectangud0jz38f o*e gwlar loop of 120 turns that carries 6.0 A if its dimej8doef3zwg 0*nsions are 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a uniform magnetic field of 0.3 ak0) q,,rii/iersh+f 0 T. The current in the loop is 2.0 A. What is the magnetic torque when the plane of the loop is perpendicular to the magnetic fieqia ser fihi0,/, +rk)ld?

  A circular loop of wire of cross-sectionay4qr 37: gjapaw0p7od l area $0.12 \; m^{2}$ consists of 200 turns, each carrying 0.50 A current. It is placed in a magnetic field of 0.050 T oriented at $30^{\circ}$ to the plane of the loop. What torque acts on the loop?

  A circular loop carrying a current of iaq,rtg ie)89 2.0 A is in a magnetic field of 3.5 T. The ge,ii8qt9ar )loop has an area of $0.12 \; m^{2}$ and its plane is oriented at a $37^{\circ}$ angle to the field. What is the magnitude of the magnetic torque on the loop?

  A circular loop of wire of radius 0.50 m is in a uniform magnq qj4 ibsl9 8m4uf-,osetic field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when the plane ol9i4jso -bsf u, 8qq4mf the loop is parallel to the magnetic field?

  A circular loop of wire of radius 0. p krtg *6nygxv/6il bj4)n7z.50 m is in a uniform magnetic field of 0.30 T. The current in thk byn x/vgi6t6* 4njl7.)rp zge loop is 2.0 A. What is the magnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular wire loop of are/w2lu(sax1r.xfmd caq8. . d ja $0.25 \; m^{2}$ carries a current of 5.0 A. The coil lies in a horizontal plane with the current flowing in the counterclockwise direction when viewed from above. At this point, the Earth's magnetic field is $1.2 \times 10^{-4} \; T$ directed $60^{\circ}$ below the horizontal. What is the magnitude of the torque which acts on the loop?

  In a mass spectrometer, a single-charged particle (charge e) haunk 4.woz2/ qfs a speed of $1.0 \times 10^6 \; m/s$ and enters a uniform magnetic field of 0.20 T. The radius of the circular orbit is 0.020 m. What is the mass of the particle?

  A doubly charged ion with v*j 0ln r1.kbz c *ucjw35zg1rjelocity $6.9 \times 10^6 \; m/s$ moves in a path of radius 30 cm in a magnetic field of 0.80 T in a mass spectrometer. What is the mass of this ion?

  A proton travels through a potential of 1.0 kV aeh5ds 6yd adun0s0t): z ;y)nynd then moves into a magnetic field 5dan:h;syy n)t) 0ds y 0zeud6of 0.040 T. What is the radius of the proton's resulting orbit?

  A proton is accelerated from rest through 500 V. It enters a magnetic field of vuglq:) bo7)+bym)a p0.30 T oriented perpendicular to its qb o)v)p uby7ma:+l )gdirection of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated through a potential difference of 10 kVx )y08p,gjy sqt48ai/fb pz1z before entering a velocity selector. If the B-field of the velocity selector has a value of 0.010 T, what value of the E-field is required ifqz1,0 i8 sa4px/jzy)ft8 ypgb the particles are to be undeflected?